package com.atguigu.day19.reference03;

public interface A {
    int getSum(int m,int n);
}
interface B{
    void b(int m,int n);
}
interface C{
    int getLength(String s);
}
interface D{
    String dConcat(String a,String b);
}
interface E{
    Person getPerson(String n,int a);
}